三天两头 sāntiānliǎngtóu frequently Origin Definitions Defs Strokes Stroke Words Sentences Sents 三天 sāntiān numeral Three Purity Realms the three highest heavens in Taoist cosmology, also known as the Three Pure Ones两头 兩頭 liǎngtou both ends both ends or either end of a physical object or a sequence